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Annotation of 43BSDTahoe/etc/quotaon.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: char copyright[] =
        !            20: "@(#) Copyright (c) 1980 Regents of the University of California.\n\
        !            21:  All rights reserved.\n";
        !            22: #endif /* not lint */
        !            23: 
        !            24: #ifndef lint
        !            25: static char sccsid[] = "@(#)quotaon.c  5.4 (Berkeley) 6/18/88";
        !            26: #endif /* not lint */
        !            27: 
        !            28: /*
        !            29:  * Turn quota on/off for a filesystem.
        !            30:  */
        !            31: #include <sys/param.h>
        !            32: #include <sys/file.h>
        !            33: #include <stdio.h>
        !            34: #include <fstab.h>
        !            35: #include <mtab.h>
        !            36: 
        !            37: struct mtab mtab[NMOUNT];
        !            38: 
        !            39: int    vflag;          /* verbose */
        !            40: int    aflag;          /* all file systems */
        !            41: int    done;
        !            42: int    mf;
        !            43: 
        !            44: char   *qfname = "quotas";
        !            45: char   quotafile[MAXPATHLEN + 1];
        !            46: char   *index(), *rindex();
        !            47: 
        !            48: main(argc, argv)
        !            49:        int argc;
        !            50:        char **argv;
        !            51: {
        !            52:        register struct fstab *fs;
        !            53:        char *whoami, *rindex();
        !            54:        int offmode = 0, errs = 0, i;
        !            55: 
        !            56:        whoami = rindex(*argv, '/') + 1;
        !            57:        if (whoami == (char *)1)
        !            58:                whoami = *argv;
        !            59:        if (strcmp(whoami, "quotaoff") == 0)
        !            60:                offmode++;
        !            61:        else if (strcmp(whoami, "quotaon") != 0) {
        !            62:                fprintf(stderr, "Name must be quotaon or quotaoff not %s\n",
        !            63:                        whoami);
        !            64:                exit(1);
        !            65:        }
        !            66: again:
        !            67:        argc--, argv++;
        !            68:        if (argc > 0 && strcmp(*argv, "-v") == 0) {
        !            69:                vflag++;
        !            70:                goto again;
        !            71:        }
        !            72:        if (argc > 0 && strcmp(*argv, "-a") == 0) {
        !            73:                aflag++;
        !            74:                goto again;
        !            75:        }
        !            76:        if (argc <= 0 && !aflag) {
        !            77:                fprintf(stderr, "Usage:\n\t%s [-v] -a\n\t%s [-v] filesys ...\n",
        !            78:                        whoami, whoami);
        !            79:                exit(1);
        !            80:        }
        !            81:        mf = open("/etc/mtab", O_RDONLY);
        !            82:        if (mf < 0) {
        !            83:                perror("/etc/mtab");
        !            84:                exit(1);
        !            85:        }
        !            86:        (void) read(mf, (char *)mtab, sizeof (mtab));
        !            87:        close(mf);
        !            88:        setfsent();
        !            89:        while ((fs = getfsent()) != NULL) {
        !            90:                if (aflag &&
        !            91:                    (fs->fs_type == 0 || strcmp(fs->fs_type, "rq") != 0))
        !            92:                        continue;
        !            93:                if (!aflag &&
        !            94:                    !(oneof(fs->fs_file, argv, argc) ||
        !            95:                      oneof(fs->fs_spec, argv, argc)))
        !            96:                        continue;
        !            97:                errs += quotaonoff(fs, offmode);
        !            98:        }
        !            99:        endfsent();
        !           100:        for (i = 0; i < argc; i++)
        !           101:                if ((done & (1 << i)) == 0)
        !           102:                        fprintf(stderr, "%s not found in /etc/fstab\n",
        !           103:                                argv[i]);
        !           104:        exit(errs);
        !           105: }
        !           106: 
        !           107: quotaonoff(fs, offmode)
        !           108:        register struct fstab *fs;
        !           109:        int offmode;
        !           110: {
        !           111: 
        !           112:        if (strcmp(fs->fs_file, "/") && readonly(fs))
        !           113:                return (1);
        !           114:        if (offmode) {
        !           115:                if (setquota(fs->fs_spec, NULL) < 0)
        !           116:                        goto bad;
        !           117:                if (vflag)
        !           118:                        printf("%s: quotas turned off\n", fs->fs_file);
        !           119:                changemtab(fs, FSTAB_RW);
        !           120:                return (0);
        !           121:        }
        !           122:        (void) sprintf(quotafile, "%s/%s", fs->fs_file, qfname);
        !           123:        if (setquota(fs->fs_spec, quotafile) < 0)
        !           124:                goto bad;
        !           125:        if (vflag)
        !           126:                printf("%s: quotas turned on\n", fs->fs_file);
        !           127:        changemtab(fs, FSTAB_RQ);
        !           128:        return (0);
        !           129: bad:
        !           130:        fprintf(stderr, "setquota: ");
        !           131:        perror(fs->fs_spec);
        !           132:        return (1);
        !           133: }
        !           134: 
        !           135: oneof(target, list, n)
        !           136:        char *target, *list[];
        !           137:        register int n;
        !           138: {
        !           139:        register int i;
        !           140: 
        !           141:        for (i = 0; i < n; i++)
        !           142:                if (strcmp(target, list[i]) == 0) {
        !           143:                        done |= 1 << i;
        !           144:                        return (1);
        !           145:                }
        !           146:        return (0);
        !           147: }
        !           148: 
        !           149: changemtab(fs, type)
        !           150:        register struct fstab *fs;
        !           151:        char *type;
        !           152: {
        !           153:        register struct mtab *mp;
        !           154:        register char *cp;
        !           155: 
        !           156:        cp = index(fs->fs_spec, '\0');
        !           157:        while (*--cp == '/')
        !           158:                *cp = '\0';
        !           159:        cp = rindex(fs->fs_spec, '/');
        !           160:        if (cp)
        !           161:                cp++;
        !           162:        else
        !           163:                cp = fs->fs_spec;
        !           164:        for (mp = mtab; mp < &mtab[NMOUNT]; mp++)
        !           165:                if (strcmp(mp->m_dname, cp) == 0)
        !           166:                        goto replace;
        !           167:        for (mp = mtab; mp < &mtab[NMOUNT]; mp++)
        !           168:                if (mp->m_path[0] == '\0')
        !           169:                        goto replace;
        !           170:        return;
        !           171: replace:
        !           172:        strcpy(mp->m_type, type);
        !           173:        mp = mtab + NMOUNT - 1;
        !           174:        while (mp > mtab && mp->m_path[0] == '\0')
        !           175:                --mp;
        !           176:        mf = creat("/etc/mtab", 0644);
        !           177:        (void) write(mf, (char *)mtab, (mp - mtab + 1) * sizeof (struct mtab));
        !           178:        close(mf);
        !           179: }
        !           180: 
        !           181: /*
        !           182:  * Verify file system is mounted and not readonly.
        !           183:  */
        !           184: readonly(fs)
        !           185:        register struct fstab *fs;
        !           186: {
        !           187:        register struct mtab *mp;
        !           188:        register char *cp;
        !           189: 
        !           190:        cp = index(fs->fs_spec, '\0');
        !           191:        while (*--cp == '/')
        !           192:                *cp = '\0';
        !           193:        cp = rindex(fs->fs_spec, '/');
        !           194:        if (cp)
        !           195:                cp++;
        !           196:        else
        !           197:                cp = fs->fs_spec;
        !           198:        for (mp = mtab; mp < mtab + NMOUNT; mp++) {
        !           199:                if (mp->m_path[0] == '\0')
        !           200:                        continue;
        !           201:                if (strcmp(cp, mp->m_dname) == 0) {
        !           202:                        if (strcmp(mp->m_type, FSTAB_RO) == 0) {
        !           203:                                printf("%s: mounted read-only\n", fs->fs_file);
        !           204:                                return (1);
        !           205:                        }
        !           206:                        return (0);
        !           207:                }
        !           208:        }
        !           209:        printf("%s: not mounted\n", fs->fs_file);
        !           210:        return (1);
        !           211: }

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